Median annual earnings of environmental scientists were $56,100 in May 2006. The middle 50 percent earned between $42,840 and $74,480. The lowest 10 percent earned less than $34,590, and the highest 10 percent earned more than $94,670.
Median annual earnings of hydrologists were $66,260 in 2006, with the middle 50 percent earning between $51,370 and $82,140, the lowest 10 percent earning less than $42,080, and the highest 10 percent earning more than $98,320.
Median annual earnings in the industries employing the largest number of environmental scientists in 2006 were as follows:
| Federal executive branch | $82,490 |
| Management, scientific, and technical consulting services | 57,280 |
| Engineering services | 56,080 |
| Local government | 52,100 |
| State government | 50,590 |
According to the National Association of Colleges and Employers, beginning salary offers in July 2007 for graduates with bachelor’s degrees in an environmental science averaged $38,336 a year.
In 2007, the Federal Government’s average salary for hydrologists was $82,217.